42480979 has 4 divisors (see below), whose sum is σ = 44716840. Its totient is φ = 40245120.

The previous prime is 42480967. The next prime is 42480983. The reversal of 42480979 is 97908424.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42480979 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42480929) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1117902 + ... + 1117939.

It is an arithmetic number, because the mean of its divisors is an integer number (11179210).

Almost surely, 2^42480979 is an apocalyptic number.

42480979 is a deficient number, since it is larger than the sum of its proper divisors (2235861).

42480979 is a wasteful number, since it uses less digits than its factorization.

42480979 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2235860.

The product of its (nonzero) digits is 145152, while the sum is 43.

The square root of 42480979 is about 6517.7433978333. The cubic root of 42480979 is about 348.9245327418.

The spelling of 42480979 in words is "forty-two million, four hundred eighty thousand, nine hundred seventy-nine".